Generate ext/spl class entries from stubs

Closes GH-6709

Use normal error in SPL for 'An iterator cannot be used with foreach by reference'

Error promotions in SPL

Warning to Error promotion and a Notice to Warning promotion to align
with the behaviour specified in the Reclassify Engine Warnings RFC.

Closes GH-6072

Remove proto comments from C files

Closes GH-5758

Add get_gc handle for object iterators

Optional handler with the same semantics as the object handler.

Remove useless prototype for spl_heap_get_iterator

SplHeap: Avoid memcpy on overlapping pointer

Check if data would overlap and also add an assert. Previous
implementations didn't have this issue, as the direct assignment was
used.

SplHeap: Avoid memcpy on overlapping pointer

Check if data would overlap and also add an assert. Previous
implementations didn't have this issue, as the direct assignment was
used.

Signed-off-by: Anatol Belski <ab@php.net>

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Use ZEND_UNREACHABLE() instead of ZEND_ASSERT(0)

Instead of marking unreachable code with `ZEND_ASSERT(0)`, we introduce
`ZEND_UNREACHABLE()`, so that MSVC which does not consider `asser

Use ZEND_UNREACHABLE() instead of ZEND_ASSERT(0)

Instead of marking unreachable code with `ZEND_ASSERT(0)`, we introduce
`ZEND_UNREACHABLE()`, so that MSVC which does not consider `assert(0)`
to mark unreachable code does no longer trigger C4715[1] warnings in
debug builds. This may be useful for other compilers as well.

[1] <https://docs.microsoft.com/de-de/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4715?view=vs-2019>

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Generate methods entries from stubs for ext/spl

Closes GH-5458

Remove unused 'ce_get_iterator' field from spl_heap_object

Fix #69264: __debugInfo() ignored while extending SPL classes

We actually implement `::__debugInfo()` and drop the `get_debug_info()`
handlers of all relevant SPL classes. This is clean

Fix #69264: __debugInfo() ignored while extending SPL classes

We actually implement `::__debugInfo()` and drop the `get_debug_info()`
handlers of all relevant SPL classes. This is cleaner and gives more
flexibility regarding overriding the functionality in descendant
classes.

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Add stubs for SplHeap and SplPriorityQueue

Closes GH-5266

Use RETURN_THROWS() after zend_throw_exception() in most of the extensions

Use RETURN_THROWS() during ZPP in the remaining extensions

In reflection, sodium, and SPL

Comparison cleanup:

- introduce zend_compare() that returns -1,0,1 dirctly (without intermediate zval)
- remove compare_objects() object handler, and keep only compare() handler

Remove mention of PHP major version in Copyright headers

Closes GH-4732.

Support variable element size in spl heap implementation

This allows us to drop the intermediate allocation for
spl_pqueue_elem.

This fixes GC for SplPriorityQueue, because we c

Support variable element size in spl heap implementation

This allows us to drop the intermediate allocation for
spl_pqueue_elem.

This fixes GC for SplPriorityQueue, because we can now directly
return a well-formed GC child buffer.

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Fixed bug #78436

Replace ZVAL_COPY() and ZVAL_COPY_VALUE() for IS_OBJECT by cheaper macros

Fixed some arg infos to match documentation

Fix SplHeap::compare arginfo and tests

Refactor zend_object_handlers API to pass zend_object* and zend_string* insted of zval(s).

Remove local variables

This patch removes the so called local variables defined per
file basis for certain editors to properly show tab width, and
similar settings. These are mainly

Remove local variables

This patch removes the so called local variables defined per
file basis for certain editors to properly show tab width, and
similar settings. These are mainly used by Vim and Emacs editors
yet with recent changes the once working definitions don't work
anymore in Vim without custom plugins or additional configuration.
Neither are these settings synced across the PHP code base.

A simpler and better approach is EditorConfig and fixing code
using some code style fixing tools in the future instead.

This patch also removes the so called modelines for Vim. Modelines
allow Vim editor specifically to set some editor configuration such as
syntax highlighting, indentation style and tab width to be set in the
first line or the last 5 lines per file basis. Since the php test
files have syntax highlighting already set in most editors properly and
EditorConfig takes care of the indentation settings, this patch removes
these as well for the Vim 6.0 and newer versions.

With the removal of local variables for certain editors such as
Emacs and Vim, the footer is also probably not needed anymore when
creating extensions using ext_skel.php script.

Additionally, Vim modelines for setting php syntax and some editor
settings has been removed from some *.phpt files. All these are
mostly not relevant for phpt files neither work properly in the
middle of the file.

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Remove yearly range from copyright notice

Remove year range from copyright notice